Miniaturized signal conditioning system for Kapton/sup (R)/-based biopotential and ion-selective electrode arrays

A miniaturized signal conditioning system for biopotential and ion-selective cardiovascular microelectrodes is presented. This prototype system will serve as the basis for an implantable, inductively powered biotelemetry system for in vivo measurements of cardiac biopotentials and ionic activities. A SPICE system model is being proposed to facilitate the design process of the system components-electrodes, signal conditioning chip, and interconnections. A prototype of the signal conditioning chip has been fabricated and tested. Thermosonic wirebonding and goldplating have been investigated as a method to interconnect this chip with the electrode array.